Who we are

Founded in Weiden in 2002, the company's strong growth in 2007 made it necessary to build a new facility in Freihung. In addition to the office and exhibition building, a total of 8,500 m² of production and storage space is currently available in four production halls on 36,000 m² of company premises. When planning the building complex, care was taken to ensure that the orientation and shape of the building would guarantee the conditions for high solar yields through direct sunlight on the glazed south façade. A 150 m² EtaSunPro vacuum tube solar system was installed on the roof as an active component which, together with the 24,000 liter seasonal storage tank, provides 80 percent of the heating energy required annually. This system is supplemented by a 45 kW pellet boiler as additional heating for two winter months. All roof surfaces of the four factory buildings are covered with PV systems and generate 350 MWh of electricity annually.
Energy efficiency and CO2 reduction in the global area of heating and hot water production have been part of the company's DNA from the very beginning. In 2016, TWL was the first company in the industry to launch the efficiency combi storage tank, which has since become the market standard. The strict structural separation of domestic hot water and heating water resulted in an energy-efficient storage tank solution for heat pumps and condensing boilers.
The heat pump stratified storage tank developed in 2020 continues this guiding principle of "optimized storage tanks for energy-efficient systems". Unprecedented clean stratification in the two separate storage areas enables highly efficient production of domestic hot water and heating water. This patent-pending design leads to an increase in the annual coefficient of performance of the heat pump.
TWL is continuing this success story with its latest new development, the PRISMA PVT RBX hybrid collector. The combination of solar thermal energy with photovoltaics achieves an unprecedented level of solar efficiency and thus makes a significant contribution to decarbonization in the building sector.